<!-- 组件说明 -->
<template>
  <div class="home">
    <el-container class="home_container">
      <!-- 头部区域 -->
      <el-header>
        <div>
          <img src="../assets/logo.png" alt="" />
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 页面主体区域 -->
      <el-container>
        <!-- 侧边栏区域 -->
        <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单区 -->
          <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" :default-active="activePath" :unique-opened="true" :collapse="isCollapse"
           :collapse-transition="false" :router="true">
            <!-- 一级菜单 -->
            <el-submenu :index="'/'+item.path" v-for="item in menulist" :key="item.id">
              <template slot="title">
                <!-- 图标 -->
                <i :class="icons[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/'+childItem.path" v-for="childItem in item.children" :key="childItem.id" 
              @click="saveNavState('/'+childItem.path)">
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{childItem.authName}}</span>
              </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容显示区域 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
//import x from ''
export default {
  components: {},
  data() {
    return {
      //左侧菜单列表
      menulist: [],
      //左侧菜单图标
      icons:{
        '125':'el-icon-user-solid',
        '103':'el-icon-s-flag',
        '101':'el-icon-message-solid',
        '102':'el-icon-s-platform',
        '145':'el-icon-s-shop'
      },
      //是否折叠菜单
      isCollapse: false,
      // 被激活的连接
      activePath: ''
    };
  },
  computed: {},
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      //1.清除token
      window.sessionStorage.clear();
      //2.跳转到登录页面
      this.$router.push("/login");
    },
    //获取所有的菜单
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    //点击按钮切换菜单的折叠与展开
    toggleCollapse(){
      console.log(1);
      this.isCollapse = !this.isCollapse
    },
    //存储路径 使得菜单正确高亮
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  }
};
</script>

<style lang='less' scoped>
.home {
  height: 100%;
}
.home_container {
  height: 100%;
}
.el-header {
  display: flex;
  justify-content: space-between;
  background-color: #373d41;
  padding-left: 0;
  align-items: center;
  > div {
    display: flex;
    align-items: center;
    img {
      width: 52px;
      height: 52px;
    }
    span {
      color: #fff;
      font-size: 20px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
  .el-menu{
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
</style>